• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Uplift-denudation history of the Qinling orogen: Constrained from the detrital-zircon U-Pb geochronology
【24h】

Uplift-denudation history of the Qinling orogen: Constrained from the detrital-zircon U-Pb geochronology

机译：秦岭造山带隆升剥蚀史：受碎屑锆石U-Pb年代学的制约

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents a great number of detrital zircon U-Pb ages from the Middle Triassic to the Middle Jurassic sediments in the Jiyuan basin, southern North China. The results represent age spectra from 2.9 Ga to 216 Ma, with five peaks at 2.5 Ga, 1.9 Ga, 840 Ma, 440 Ma, and 270 Ma and two grains of ～220 Ma. The ages of 2.5 Ga and 1.9 Ga are mainly derived from the Precambrian basement of the North China Block, whereas the others are typical characteristics of the Qinling orogenic belt. An important observation is that the Qinling-sourced detrital zircons become older as the strata get younger. Samples from the Middle Triassic to early Late Triassic strata are characterized by the age peak at 270 Ma, whereas the Late Late Triassic to Early Middle Jurassic samples are dominated by age peaks at 840 Ma and 440 Ma and minor grains within 800-650 Ma. Two grains of～220 Ma are preserved in the Late Middle Jurassic sample, which may be contributed by the Carnian deep plutons. These signatures indicate that the unroofing pattern of the Qinling orogenic belt developed by the denudation of materials from young covers to old basements and the Carnian deep plutons. Integrated with the data reported from the Hefei Basin, it is well-established that the intensity of unroofing increased from the Qinling to the Dabie orogen in the Early Jurassic, and the denudation timing of the ultra-high pressure (UHP) and high pressure (HP) rocks or Carnian plutons changed successively from the Early Jurassic in the Dabie to the Late Middle Jurassic in the Qinling orogen.
机译：本文介绍了华北南部济源盆地从中三叠世到中侏罗世沉积的大量碎屑锆石U-Pb年龄。结果代表了从2.9 Ga到216 Ma的年龄谱，在2.5 Ga，1.9 Ga，840 Ma，440 Ma和270 Ma上有五个峰值，两个晶粒为〜220 Ma。 2.5 Ga和1.9 Ga的年龄主要来自华北地块的前寒武纪基底，而其他则是秦岭造山带的典型特征。一个重要的发现是，随着地层变年轻，源自秦岭的碎屑锆石变老。中三叠纪至三叠纪早期地层的特征是年龄在270 Ma的峰值，而三叠纪晚期至中侏罗纪早期的样本则以840 Ma和440 Ma的年龄峰值和800-650 Ma的小晶粒为主。中侏罗世晚期的样品中保留了两个〜220 Ma的颗粒，这可能是由Carnian深层的海盆贡献的。这些特征表明，秦岭造山带的顶板模式是由物质的剥蚀形成的，这些物质从年轻的盖层到老的地下室和卡尼深深的云母。结合合肥盆地报道的数据，可以确定侏罗纪早期从秦岭到大别造山带的顶棚强度增加，以及超高压（UHP）和高压的剥蚀时间（从大别侏罗纪早期到秦岭造山带中侏罗世晚期，HP）岩石或卡尼阶岩体依次发生变化。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2014年第1期|54-65|共12页
  • 作者

    Wentao Yang; Jianghai Yang; Xiaofeng Wang; Yuansheng Du;

  • 作者单位

    Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003, China,State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;

    State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;

    State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;

    State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Qinling orogen; Jiyuan basin; Detrital zircon; Provenance; Unroofing pattern;

    机译：秦岭造山带;济源盆地;碎屑锆石;种源屋面花纹;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号